But the 22-year-old singer was in luck, as the employee reveals that a customer in line behind Bieber picked up the tab.

Always nice to see a bystander do a good deed!

See photos of Justin Bieber through the years:

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The Evolution of Justin Bieber

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The Evolution of Justin Bieber

FILE - In this Oct. 8, 2009 file photo, singer Justin Bieber appears on the NBC "Today" television program in New York. New York police shut down a mall appearance by teen pop singer Justin Bieber after thousands of young girls showed up and got a little too wild. Nassau County police say girls and adults in the crowd of nearly 3,000 started pushing and shoving as they waited for the 15-year-old sensation to arrive Friday, Nov. 20, 2009 at the Roosevelt Field Mall in Garden City, N.Y. (AP Photo/Richard Drew, File)

Singer Justin Bieber tips his cap during the fourth quarter of the New York Knicks' 93-84 win over the Portland Trail Blazers in their NBA basketball game at Madison Square Garden in New York, Monday, Dec. 7, 2009. (AP Photo/Kathy Willens)

Justin Bieber performs during the 93.3 FLZ Jingle Ball at the Tampa Bay Times Forum on Sunday, Dec. 9, 2012, in Tampa, Fla. (Photo by John Davisson/Invision/AP)

Justin Bieber seen at the World Premiere of Open Road's "Justin Bieber's Believe" presented by Teen Vogue and sponsored by Clearasil, on Wednesday, Dec. 18, 2013 in Los Angeles. (Photo by Eric Charbonneau/Invision for Open Road Films/AP Images)

Canadian pop megastar Justin Bieber (C) plays basketball with a young survivor of Super Typhoon Haiyan in Palo, Leyte province on December 10, 2013. Pop megastar Justin Bieber sang to and played basketball with young survivors of the Philippines' deadliest typhoon on December 10 after he flew into the disaster zone to boost an international relief effort. AFP PHOTO (Photo credit should read STR/AFP/Getty Images)

FILE - In this March 19, 2013, file photo, singer Justin Bieber performs during a concert at Bercy Arena in Paris. Canadian police say the pop star has been charged Tuesday, Sept. 2, 2014, with dangerous driving and assault after a collision between a minivan and an ATV led to a physical altercation in southwestern Ontario. Ontario Provincial Police say that the incident happened Friday afternoon, Aug. 29, near Bieber's hometown of Stratford and that he was released on a promise to appear in court Sept. 29. (AP Photo/Francois Mori, File)

LOS ANGELES, CA - JULY 27: The winner of Champ of Charity singer Justin Bieber (L) and singer Cody Simpson onstage at the 2014 Young Hollywood Awards brought to you by Samsung Galaxy at The Wiltern on July 27, 2014 in Los Angeles, California. The Young Hollywood Awards will air on Monday, July 28 8/7c on The CW. (Photo by Frederick M. Brown/Getty Images for Variety)

Singer Justin Bieber speaks to photographers as he arrives at the amfAR Cinema Against AIDS benefit at the Hotel du Cap-Eden-Roc, during the 67th international film festival, in Cap d'Antibes, southern France, Thursday, May 22, 2014. (Photo by Joel Ryan/Invision/AP)

Justin Bieber arrives at the amfAR Cinema Against AIDS benefit at the Hotel du Cap-Eden-Roc, during the 67th international film festival, in Cap d'Antibes, southern France, Thursday, May 22, 2014. (Photo by Joel Ryan/Invision/AP)

File- In this Dec. 18, 2013 file photo, singer Justin Bieber takes a "selfie" with a fan at a premiere in Los Angeles. The Los Angeles Sheriff's Department says it is searching Justin Bieber's home for evidence in an egg-tossing vandalism case involving the pop star on Thursday, Jan. 9, 2014. (AP Photo/Dan Steinberg, Invision)

FILE - In this Dec. 18, 2013 file photo, Singer Justin Bieber arrives at the premiere of the feature film "Justin Bieber's Believe" at Regal Cinemas L.A. Live in Los Angeles. A security guard and driver for Bieber have been arrested near Atlanta and charged with stealing a photographer's camera on Tuesday, Feb. 25, 2014. (Photo by Dan Steinberg/Invision/AP, File)

Justin Bieber arrives at the amfAR Cinema Against AIDS benefit at the Hotel du Cap-Eden-Roc, during the 67th international film festival, in Cap d'Antibes, southern France, Thursday, May 22, 2014. (Photo by Joel Ryan/Invision/AP)

In this Jan. 23, 2014 video frame grab released by the Miami Beach Police Department, shows singer Justin Bieber, right, taking to R&B singer Khalil Amir Sharieff , left, while both were under arrest at the Miami Beach police in Miami Beach, Fla. The Miami-Dade county prosecutors released about 10 hours of video, Wednesday, Feb. 26, 2014. Bieber pleaded not guilty to driving under the influence, resisting arrest and driving with an invalid license. (AP Photo/Miami Beach Police Dept. HO)

The "Baby" singer headed straight to the salon for a new makeover ... this time going blonde! (Instagram)

Singer Justin Bieber, center, takes a selfie with a young fan as he watches the Los Angeles Clippers play the Oklahoma City Thunder with his mother Pattie Mallette in the second half of Game 4 of the Western Conference semifinal NBA basketball playoff series, Sunday, May 11, 2014, in Los Angeles. (AP Photo/Mark J. Terrill)

FILE - This Jan. 23, 2014 file photo made available by the Miami Beach Police Dept., shows Justin Bieber at the police station in Miami Beach, Fla. Bieber claimed after a shaky sobriety test following his Jan. 23 arrest that he was suffering from a hairline fracture in his right foot and made condescending comments about enjoying his wealth, according to a Miami Beach police document released Tuesday, March 18. Bieber, who has pleaded not guilty to driving under the influence and other charges, also told officers he was not drag racing in a rented Lamborghini along with R&B singer Khalil Amir Sharieff, who was driving a Ferrari when both were stopped. (AP Photo/Miami Beach Police Dept., File)

Pop singer Justin Bieber, left, is escorted out of the Turner Guilford Knight Correctional Center, Thursday Jan. 23, 2014 in Doral, Fla., following his arrest earlier in the day in Miami Beach. Bieber was arrested and charged with driving under the influence and resisting arrest after police said they saw him speeding down a residential street in a yellow Lamborghini. Officers say he had an expired license, was initially not cooperative when he was pulled over, and smelled of alcohol. (AP Photo/Wilfredo Lee)

FILE - This May 11, 2014 file photo shows singer Justin Bieber, attending a Los Angeles Clippers game in Los Angeles. Bieber pleaded no contest on Wednesday, July 9, 2014 to misdemeanor vandalism for throwing eggs at a neighbor's Calabasas home in January and was sentenced to two years probation. (AP Photo/Mark J. Terrill, FIle )

These police booking mugs made available by the Miami Dade County Corrections Department show pop star Justin Bieber, Thursday, Jan. 23, 2014. Bieber and singer Khalil were arrested early Thursday for allegedly drag-racing on a Miami Beach Street. Police say Bieber has been charged with resisting arrest without violence in addition to drag racing and DUI. Police also say the singer told authorities he had consumed alcohol, smoked marijuana and taken prescription drugs. (AP Photo/Miami Dade County Jail)

Los Angeles County Sheriff's leave "The Oaks of Calabasas" property, where the residence of the pop star, Justin Bieber was searched by police in Calabasas, Calif., on Tuesday, Jan 14, 2014. Detectives searched Bieber's home looking for surveillance footage that might serve as evidence the pop star was involved in an egg-tossing vandalism case that caused thousands of dollars in damage to a neighbor's home, an official said Tuesday. Roughly a dozen investigators searched the home and arrested one member of the singer's entourage on suspicion of cocaine possession. (AP Photo/Nick Ut)

A Miami Beach, Fla., police prisoner transport van leaves the Miami Beach Police building believed to be transporting pop singer Justin Bieber and R&B singer known as Khalil after their arrest, Thursday, Jan. 23, 2014 in Miami Beach. Bieber and Khalil both face drag-racing and driving under the influence charges. (AP Photo/Wilfredo Lee)

NEW YORK, NY - JAN 17: General view of a Justin Bieber for Calvin Klein Billboard located on Houston Street on January 17, 2015 in New York City. (Photo by Tomas/IMAGES/Getty Images)

Justin Bieber arrives at The Metropolitan Museum of Art's Costume Institute benefit gala celebrating "China: Through the Looking Glass" on Monday, May 4, 2015, in New York. (Photo by Evan Agostini/Invision/AP)